Federal Reserve Chair Jerome Powell said that the central bank may have to tighten its oversight of the American financial system in the wake of the failure of three large US banks this spring.
The report said that the precise amount of capital requirements will depend on the bank's business, with U.S. megabanks with big trading businesses expected to face the largest increases.
The daily tenders were made available after the failure of Silicon Valley Bank and the sale of Credit Suisse sent jitters across financial markets, raising the risk of liquidity shortages in case confidence falls further.
US authorities unveiled sweeping measures Sunday to rescue depositors' money in full from failed Silicon Valley Bank and to promise other institutions help in meeting customers' needs.